Fate of PFAS in Subsurface Engineered Wetlands Receiving Treated Wastewater
David Sedlak, Professor
Civil and Environmental Engineering
Closed. This professor is continuing with Spring 2026 apprentices on this project; no new apprentices needed for Fall 2026.
My project aims to determine the fate of per- and polyfluoroalkyl substances (PFAS) in a subsurface wetland system receiving treated wastewater. I use geomedia sorbents, like activated carbon, to sequester PFAS below ground as water flows through our field site, which we call the Horizontal Levee. I am working to understand how well this engineered wetland can remove PFAS from wastewater and how transformations of PFAS precursors occur in the biologically active zones of the wetland. I accomplish this by analyzing both water and sediment samples from our field site in San Lorenzo, CA. In addition to analyzing field samples, I work in the lab to simulate field conditions in order to make predictions about PFAS fate using sorption isotherms. Projects just like this one are being implemented all over the Bay Area and hold are relevant for anyone interested in water chemistry, emerging contaminants, or nature-based water treatment systems.
1 year (two semester) minimum commitment required.
Role: I am looking for undergraduates to help me with both field sample preparation using solid phase extraction (SPE) and isotherm setup/experimentation in the lab. Help with data visualization and analysis may become a responsibility once research assistants have gained familiarity with the sample preparation process. Undergraduate assistants will develop their skills with general lab procedures (e.g. pipetting, using scales, working in fume hoods) as well as with PFAS-specific sample preparation (e.g. extraction of sediment and aqueous samples, total oxidizable precursor assay). Research assistants may also have the opportunity to assist with literature reviews and the paper writing process, though priority will be placed on field sample preparation.
Qualifications: Previous lab experience is desired, but not required. Preference will be given to upperclassmen and students who have uninterrupted periods of at least 4 hours available in their class schedule.
Day-to-day supervisor for this project: Anthony DeSaslvo, Ph.D. candidate
Hours: 9-11 hrs
Related website: https://www.sfestuary.org/oro-loma-living-laboratory/
Related website: https://www.sfestuary.org/oro-loma-living-laboratory/